isalnum
测试一个元素来包装区域设置是一个字母或数值字符。
template<Class CharType>
bool isalnum(
CharType _Ch,
const locale& _Loc
)
参数
_Ch
要测试的元素的字母数字。_Loc
包含字母数字元素的区域设置进行测试。
返回值
true,则测试元素的字母数字;false,则不是。
示例
// locale_isalnum.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>
using namespace std;
int main( )
{
locale loc ( "German_Germany" );
bool result1 = isalnum ( 'L', loc);
bool result2 = isalnum ( '@', loc);
bool result3 = isalnum ( '3', loc);
if ( result1 )
cout << "The character 'L' in the locale is "
<< "alphanumeric." << endl;
else
cout << "The character 'L' in the locale is "
<< " not alphanumeric." << endl;
if ( result2 )
cout << "The character '@' in the locale is "
<< "alphanumeric." << endl;
else
cout << "The character '@' in the locale is "
<< " not alphanumeric." << endl;
if ( result3 )
cout << "The character '3' in the locale is "
<< "alphanumeric." << endl;
else
cout << "The character '3' in the locale is "
<< " not alphanumeric." << endl;
}
要求
页眉: <区域设置>
命名空间: std